Rotary box blanking machine



Dec. 22, 1931 L. H. SCHROEDER ET AL 3 3 ROTARY BOX BLANKING MACHINE Filed Aug. 18, 1924 z Sheets-Sheet 1 TNESSES L n 1 v 1 NZo er g w aw -9 a j Esme/7469 6 ATTORNEYS Dec. 22, 1931- H. SCHROEDER ET AL 1,337,235

ROTARY BOX BLANKING MACHINE Filed Aug. 1 1924 5 Sheets-Sheet 2 z I III/11% WITNESSES INVE TO RS d L'ouiaESc r0 0???" fisizua 74 62972 ATTORNEYS Q 7 Dec. 22, 1931. 1.. H. SCHROEDER ET AL ROTARY BOX BLANKING MACHINE Filed Aug. 18, 1924 .5 Sheets-Sheet 3 [NVENTO R5 vL ozasJ-E Schr dczer Jbsz uwflfz ner 7 ATTORNEYS Patented Dec. 22,. 1931 intro ran DOUIS H. SCHROEDER, OF WOODHAVEN, AND JOSHUA WAGNER, F BROOKLYN, NEW

'YORK, ASSIGNCRS, BY MESNE ASSIGNMENTS, TO UEL 0F CAMDEN, NEW JERSEY, A CORPORATION OF NEW JERSEY M. LANGSTON COMPANY ROTARY BOX BLANKING MACHINE Application filed August 18, 1924. Serial No. 732,847.

This invention relates to box blanking machines and has for an object to provide an improved construction for automatically cutting slots, creasing and trimming a blank ready for folding into a box, the structure being such that the parts may be quickly adjusted to form blank boxes of different sizes.

Another object of the invention is to provide a box blanking machine of the rotary type wherein the uncut blanks may be fed successively through the machine and slotted and creased as they are fed with the crease always in exact alignment with the slots.

A still further object of the invention is to provide a rotary box blanking machine wherein the creasing roller and the slotting dies automatically remain in alignment as they are adjustedto operate on different size blanks.

A still further object, more specifically, is to provide a box blanking machine wherein means are provided forejecting automatically the matter cut from the blank for forming a slot.

In the accompanying drawings- Figure is a perspective view on a reduced scale of a machine disclosing an embodiment of the invention.

Figure 2 is a perspective view of a blank after'the same has passed through the machine shown in Figure 1, certain parts being broken away for illustrating the creased formation.

Figure 3 is a sectional View through Figure 2, approximately on line 3-3.

Figure 4 is a sectional view through Figure 1, approximately on line-H.

Figure 5 is an enlarged detail fragmentary sectional view through the creasin and cutting structures and certain other parts.

Figure 6 is a detail perspective view of one of the cutting dies.

Figure 7 is a top plan view of the creasing roller and associated grooved or female slotting head.

Figure 8 is a fragmentary side view looking from the opposite side to Figure 1 andv ciated with certain gear wheels.

Referringto the accompanying drawings illustrating how the power pulley is asso by numerals, 11 indicates a frame of any desired kind which includes suitable standards ,12 and any desired number of cross pieces,

brackets and the like for supporting different shafts and other parts of the machine. This machine is an improvement over the machine shown in our Patent No. 1,493,404 dated May 6, 1924.

- 0n the frame 11 is arranged a table 13 over which a number of chains 14 are adapted to pass, said chains being supported by suitable sprocket wheels 15, 16 and 17, sprocket wheels 15 and 16 being carried by suitable shafts mounted on the frame. A feeding bar 18 is shown connected to these chains in Figure 1, any desired number of these feeding bars being used, as illustrated in Figure 4,.said

chains acting to feed successive blanks 19 to the creasing and slotting rollers'at the proper time. I

Power is applied to the machine from any suitable source by a belt or otherwise to the pulley wheel 20 connected to the shaft 21. Power may be taken off from this shaft in any desirable wa so as to operate the other moving parts. or instance power is transmitted from shaft 21 to shaft by gears 23 and 24 while power is taken from shaft 21 and transmitted to shaft 22 by gear wheels 1' and 22' connected to these respective shafts. The train of gearing 27 connects shaft 21 with the shaft 28. By thus connecting all of the shafts from a'single driving shaft, the parts will always operate 1n proper time and, consequently, the blanks will be fed at the proper time and the slots will always be of the right length.

As indicated in Figure 4, the blanks 19 are forced from their holder 29 by'one of the feeding bars 18, the holder 29 being spaced a sufficient distance above the platform 13 to permit this action. As this takes place, the blank will be forced between the creasing roller 30 and the pressure roller 31 whereupon the blank will be creased for its entire length. Before the blank leaves the rollers 30 and 31, it passes between the two slotting dies or heads 32 and 33 and is slotted by the respective cutters 34and 35. By this construction and arrangement, the slots 36 and 37 are formed and the crease 38 is provided which crease extends from one slot to the other and in exact alignment therewith. The length of the slots 36 and 37 may be varied if desired but they will always be in true alignment therewith. Details of only one die wheel 32 and one die wheel 33 and associated parts have been shown in Figures 4 and 5 but it will be understood that any desired number may be used, as for instance, three, (there being three illustrated in Figure 1.) The die wheel 33 is provided with an annular smooth face 39 which presses against the blanks sufficiently to cause the same to feed through the machine but does not unduly compress the blank. An annular plate 40 is bolted or otherwise rigidly secured in place, said plate 40 having an annular smooth surface 39 coacting with surface 39 and a recess portion 41 to urge the blank 19 through the machine.

The wheel 33 is also provided with an areshaped recess 42 adapted to receive the slotting blade 34, which slotting blade is provided with a number of pins 44 fitting into similar shaped depressions in wheel 42. The blade 34 is held fixed by the pins 44 as they are arranged in similar shaped sockets. The blade 35, however, is adjustable as the pins 43 extending therefrom fit into an arc-shaped groove 45. When the blade is clamped in position by the plate 40, it is held against independent rotary movement while permitted a limited rotary movement when the plate 40 is loosened in order to secure the desired ad- 'ustment of the blade. By adjusting the lade 35, the slots 36 and 37 may be made longer or shorter or the blades could be made to cut a larger or smaller blank. The wheel 33 is splined on the shaft 28 but is locked against shifting by suitable set screws 46 which must be loosened whenever it is desired to shift the wheel lon itudina-lly of the shaft 28. Co-acting with t e wheel 33 is the die or wheel 32 which is provided with a smooth periphery 47 divided by a slot 48, which slot is in alignment with the cutters 34 and 35 and is of a size to receive these knives which snugly fit therein and in this way produce a shearing cut when operating on any of the blanks 19. The wheel 32 is splined to the shaft 49 and is locked in its adjusted position by suitable set screws 50.

When a blank has been slotted, the matter forced from the blank will remain wedged rather tightly in the cut or groove 48 and in order to automatically remove this material a slightly resilient hook-shaped ejector 51 is provided. This ejector as shown in Figure 4, normally is out of contact with the bottom of the slot 48 but when considerable pressure is brought to bear thereon, will yield until it moves into contact and in that way permit an extra thick paper to be forced into the slot 48 when necessary. As the paper chip in the slot moves around with the wheel 32, t

will be gradually forced out of the slot as it reaches the point 52 (Figure 4.) Co-acting with the die or wheel 32 is a creasing roller 30 which is held in alignment by having the peripheral part extending into the groove as shown in Figures 4 and 7. The creasing roller 30 is splined to the shaft 22 but is not locked thereto whereby whenever roller 32 is moved longitudinally of shaft 49 for cutting a larger or smaller box or causing the slots to be further apart or nearer together, the creasing roller will automatically move and will remain in proper alignment.

Preferably when the parts are adjusted to out different size blanks or different spaced slots, the set screws 46 and -are loosened and one of the blades 34 and 35 is brought to a position to project into the slot 48. The various parts are then slid along their various shafts simultaneously whereby all parts will automatically remain in exact alignment. When the desired adjustment has been secured, the set screws 46 and 50 will be tightened and the machine is ready for operation unless it is necesary to adjust the knives 53 and 54, which knives are adjustably mounted on the respective shafts 28 and 49 as shown in our former patent above referred to.

Referring again to the ejector 51, it will be noted that the same has a square hollow base 55 which is slidingly mounted on a square shaft 56, which shaft is secured in any desired manner to the frame 11.

In order that the parts may be shifted longitudinally of the respective shafts 28 and 49 and the shifting done conveniently, a tool 57 is inserted as shown in dotted lines in Figures 4 and 5.. This tool is provided with an adj ustable stop 58, which is adapted to rest against the angle iron fitting 59. Part of this instrument fits into one of the notches 60 of the bracket 59 and uses the bracket as a fulcrum so as to force the parts in a given direction. In case it should be desired to force the parts in the opposite direction, the instrument sired length of slot, a tool is applied to the squared'end 61 of the shaft 62 to which the pinion 63 is rigidly secured. Before this is done; the bolt 64 is loosened whereby the gear member 65 is free to rotate on the hub 66 of the gear wheel 67. As the pinion 63 is rotated, the same will rotate gear 67 independent of the gear member 65 and, consequently, will rotate the shaft 28 a short distance or enough to secure the desired adjustment of knife 34. This adjustment is indicated by the pointer 68 which is rotated with the gear 67 and moves over a dial 69. After the desired adjustment has been secured for knife 34, bolt 64 is again tightened; The enment with the slots, saidslotting and creasing means being respectively supported by larged head of bolt 64" is normally loosely heads axially of their shafts, said mechanism positioned in an arc-shaped slot 70 in the being adapted to apply pressure directly to gear member 65 whereby the desired rotary each ofs movement may be secured. After the knife 34 has been adjusted as described, knife 35 must be adjusted manually and positioned the desired distance fromknife 34.

What we claim is:

1. In a rotary box blanking nT achine,

means for slotting a blank on opposite edges,

and means for creasing the blank between said slots, said slotting and creasing means being constantly interengaged and adjustable matically maintaining the creases in alignparallel rotary shafts.

2. In a rotary box blanking machine,creasing means including a creasing roller, and

slotting means for slotting the opposite edges of the blank, said slotting means including a roller having a groove therein, said roller being positioned so that the creasing roller will project into said groove whereby all of the parts are interengaged and are adjustable simultaneously for different sized blanks,

said creasing roller being carried by a rotary shaft. 7

3. In a rotary box blanking machine, a plurality of sets of slotting members adapted to be adjusted toward and from eachsother,

said slotting members having parts which interengage whereby the units are adjusted as one member, and a creasing roller for each of the slotting units, said creasing rollers continually overlapping part of the slotting structure whereby they are automatically shifted toward each other with the slotting structures, said creasing rollers being carried by a common shaft.

4. A rotary slotting and scoring machine of the class described, having a pair of slotting heads carried by spaced parallel shafts, a transverse notched member carried by said machine, and a lever adapted to engage in the notches of said member as a fulcrum to apply pressure to move said slotting heads axially along their shafts.

5. A rotary slotting and scoring machine of the class described, having a pair of slot- 7 ting heads carried by spaced parallel shafts,

a transverse notched member carried by said machine, and a lever adapted to engage in the notches of said member as a fulcrum to apply pressure to move said slottin heads axially along their shafts, said lever eing T-shaped to bear simultaneously against both of said slotting heads.

6. A rotary slotting and scoring machine v of the class described, having a pair of slot,-

ting heads carried by spaced parallel shafts, an mechanism for shifting said slotting aid slotting heads.

LOUIS H. SCHROEDER.

JOSHUA WAGNER. 

